XSCHART Statement: SHEWHART Procedure

You can specify axis labels by assigning labels to particular variables in the input data set, as summarized in the following table:

Axis	Input Data Set	Variable
Horizontal	all	subgroup-variable
Vertical ( chart)	DATA=	process
Vertical ( chart)	HISTORY=	subgroup mean variable
Vertical ( chart)	TABLE=	_SUBX_

You can specify distinct labels for the vertical axes of the and s charts by breaking the vertical axis into two parts with a split character. Specify the split character with the SPLIT= option. The first part labels the vertical axis of the chart, and the second part labels the vertical axis of the s chart.

For example, the following sets of statements specify the label Avg Power Output for the vertical axis of the chart and the label Std Deviation for the vertical axis of the s chart:

proc shewhart data=Turbine;
   xschart KWatts*Day / split = '/' ;
   label KWatts = 'Avg Power Output/Std Deviation';
run;

proc shewhart history=Turbhist;
   xschart KWatts*Day / split = '/' ;
   label KWattsX = 'Avg Power Output/Std Deviation';
run;

proc shewhart table=Turbtab;
   xschart KWatts*Day / split = '/' ;
   label _SUBX_ = 'Avg Power Output/Std Deviation';
run;

In this example, the label assignments are in effect only for the duration of the procedure step, and they temporarily override any permanent labels associated with the variables.